The workshop · Independent · 26 Oct 2026

SmarakNayak/thundersub

Scan your whole mailbox, unsubscribe from everything, and clean up — 100% locally in Thunderbird

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ThunderSub. Unsubscribe and clean up your Thunderbird inbox.
Verified26 Oct 2026

Radar check

What we found when we opened it. Every bar is one fact, with its date.

Alive70

Last code pushed 1 Sep 2026, 55 days before this check.

Releases85

Latest release v1.1.1 on 28 Aug 2026.

Maturity25

Public since March 2026, 7 months.

Adoption25

16 stars and 1 forks.

Activity45

14 commits and 3 new issues in the last 90 days.

Community10

1 contributor. No pull requests merged in 90 days; changes go in directly. A small team carries it.

Security40

No security policy file says how to report a problem. No published security advisories.

Licence MPL-2.0: free to use, even inside paid software; changes to this project itself must be sharedSetup effort 2 of 5Payoff 4 of 5
How the bars are scored
  • Alive. Days since the last code push: a week or less 100, a month 90, three months 70, six months 50, a year 30, eighteen months 15, older 0.
  • Releases. Age of the latest GitHub release, on a similar scale; no bar when the project publishes no releases.
  • Maturity. Age of the project: eight years 100, five 90, three 70, two 55, one 40, six months 25, younger 10.
  • Adoption. Stars on a log scale: 100,000 stars is 100, 10,000 is 80, 1,000 is 60, 100 is 40.
  • Activity. Commits in the last 90 days: 300 or more 100, 100 85, 30 65, 10 45, any 25.
  • Community. People who have contributed: 100 or more 100, 30 80, 10 60, 5 40, 2 25, one 10.
  • Security. A published security policy 80, none 40; published advisories are listed, not scored.

Checked by Repo Radar on 26 Oct 2026 from the repository on GitHub.

In simple English

Your email inbox fills up with newsletters and junk over the years. Cleaning them out by hand takes hours of clicking. This extension scans your mail folders inside Thunderbird and finds every subscription. You can then unsubscribe from everything in one place and clean up the old messages. Nothing leaves your computer, and no cloud service reads your mail.

What it is

An extension for the Thunderbird email app that scans your messages for subscription headers and links. It groups them by sender and lets you review, unsubscribe, delete, or move past emails.

What it is good for

Anyone who uses Thunderbird and wants to get rid of years of unwanted newsletters without trusting their password to an online cleanup service.

Stars16
LicenceMPL-2.0
Latestv1.1.1 (2026-08-28)checked 26 Oct 2026
Last code change2026-09-01
Written inJavaScript
Setup effort
2 / 5
Payoff
4 / 5
Good
  • Runs entirely on your machine with no cloud servers or accounts needed.
  • Detects unsubscribe links and headers in thirteen languages.
  • Includes a dry-run mode so you can test every action safely before changing your mail.
Watch for
  • Requires Thunderbird version 128 or later to run.
  • Processing thousands of old emails can take some time on slower computers.
  • Only works inside the Thunderbird desktop application.
Replaces

manually clicking unsubscribe links at the bottom of hundreds of emails

Works well with

Thunderbird

Similar repositories
  • LucBennett/BetterUnsubscribe25 stars

    Another Thunderbird extension for unsubscribing from emails, though focused on per-message actions rather than full mailbox scanning.

Install
git clone https://github.com/SmarakNayak/thundersub.git
cd thundersub
bash build.sh

Independent: reviewed for Repo Radar outside the daily editions. Every independent repository

On Stack Radar: Productivity & Collaboration › Email & Team Communication › Inbox Cleanup & Email Filtering.

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